Abstract：
Collaborative crime poses severe social hazards. In collaborative crime scenarios, previous studies have indicated that perpetrators\' collaborative encoding can impair the detection efficiency of P300-based complex trial protocols due to the collaborative encoding deficit. The feedback concealed information test (fCIT), a unique variation of the concealed information test, provides participants with feedback on how well they conceal information from memory. The fCIT, which has proven to be highly efficient, detects concealed information using recognition P300 along with feedback-related event-related potentials, and reflects the subject\'s motivation to conceal. However, no studies have examined the fCIT\'s effectiveness in identifying collaborative criminals. We propose that the fCIT\'s efficiency persists in cases of collaborative crime and test this hypothesis using a sample of 48 participants. The participants in the collaborative groups were instructed to have hushed conversations about theft to simulate the collaborative crime process. Subsequently, they completed the fCIT. The findings indicate a significant decline in recognition P300\'s detection efficiency when participants committed crimes collaboratively. Nevertheless, the detection efficiency of feedback P300 and feedback-related negativity remained high. This study\'s outcomes illustrate the capacity of the fCIT to detect perpetrators involved in collaborative crime.
摘要：
协同犯罪具有严重的社会危害。在合作犯罪场景中，先前的研究表明，由于协作编码缺陷，加害者的协作编码会损害基于P300的复杂试验协议的检测效率。反馈隐藏信息测试(fCIT)，隐藏信息测试的独特变化，为参与者提供反馈，说明他们在记忆中隐藏信息的程度。FCIT,被证明是高效的，使用识别P300以及反馈相关的事件相关电位来检测隐藏信息，并反映了受试者隐瞒的动机。然而,没有研究检查fCIT在识别合作罪犯方面的有效性。我们建议在合作犯罪的情况下，fCIT的效率仍然存在，并使用48位参与者的样本来检验这一假设。协作小组的参与者被指示进行有关盗窃的安静对话，以模拟协作犯罪过程。随后，他们完成了fCIT。研究结果表明，当参与者合作犯罪时，识别P300的检测效率显着下降。然而，反馈P300的检测效率和反馈相关的负性仍然很高。这项研究的结果说明了fCIT检测参与合作犯罪的肇事者的能力。
